The brand new RVO Horizon® 80mm ED Doublet refractor has joined the RVO Horizon family! These superior quality refractors deliver breathtaking images thanks to it's FPL-53 glass which will deliver high contrast, sharp views each and every time! This amazing new telescope system is backed up by matching accessories such as a 1.0x field flattener, 0.8x reducer flattener and the Horizon 50mm guidescope.
- Fresh & Unique Looking Design
- High Quality FPL-53 ED Optics
- Zygo Optical Test With Every Scope
- Minimum 0.95 Strehl Ratio
- Collimatable Cell
- Heavy Duty Rack & Pinion 2" Focuser With 1.25" Adaptor
- 10:1 Microfocuser
- Long Slotted Dovetail Bar With Riser Blocks For Easy Balancing
- High Quality Tube Rings
- Retractable Dew Shield
- Top Vixen Bar For Mounting Horizon® Guide & Other Accessories
- Aluminium Flight Case Included
We are incredibly proud and excited to announce another high quality ED refractor. A beautifully designed 80mm ED refractor capable of visual and imaging, both for planetary and deep sky. The longer focal length compared to the Horizon 72 ensures a larger reach whilst ensuring wide field for DSO work. The refractor is designed in our striking colours to match the other Horizon refractors. We have developed and manufactured this scope to meet all the needs of the modern day imager. The scope itself has high quality FPL-53 ED glass complete with matching zygo report so you can see for yourself, the quality of the lens you are purchasing. Not only that, we guarantee that all of our telescopes have a minimum 0.95 Strehl ratio for the highest quality images every time. In addition to this, we optically test each and every telescope that we sell to ensure you receive a perfect telescope each and every time. The scope is complimented with an aluminium lockable hard case for transport and storage. All featuring the brand new RVO Horizon® logo.
This telescope features a high quality 2" dual speed rack and pinion focuser. All CNC machined for a superb build quality and ultimate hold when accessories such as flatteners and CMOS/SLR cameras are attached. The 10:1 microfocuser ensures you can achieve the perfect focus every time. The focuser also features an indexed drawtube for precise and fast repositioning of targets. It also includes a focus lock so you can't accidentally alter focus when imaging.
Unlike most imaging refractors, this telescope has been designed to overcome all the issues with other telescopes. The main issue is balancing when you start to add heavy accessories and cameras. The Horizon® 80 ED comes as standard with a 30cm slotted vixen style dovetail bar, plus riser blocks fitted to the rings to ensure it misses the focus lock knob. Simply add your accessories, then slide your Horizon® OTA higher up the dovetail saddle and you are balanced. No additional accessories are required. The OTA kit also comes with a short vixen style bar to sit on top of the tube rings for adding our superb Horizon® Guide guidescope or other accessories with a vixen style clamp.
The Horizon® 80ED comes as standard with a 2" visual back, plus 2" - 1.25" adaptor. All connections feature non-marring compression rings for security and ease of use. Both 2" and 1.25" diagonals are fully compatible with the Horizon® 80. The long drawtube ensures achievable focus when using a wide range of diagonals and eyepieces. The OTA is also fitted with a universal synta style base for attaching a wide range of finderscopes and guidescopes. If you are looking for a lightweight alternative to the Horizon® Guide, then look at our 50mm mini Horizon guide scope, which is fully compatible. This will keep the weight down on the system which is paramount if you are using smaller, lightweight equatorial mounts.
An in house Zygo interferometer test & report is supplied with the Horizon 80mm.
The interferometer is essentially a measuring instrument. Within the interferometer is a calibrated laser that is pointed through the optical test surface, then onto a high quality reference sphere, then back through the test subject then to an internal camera which gives us the measurement on the screen. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system. The more central the laser to the test optic and then on return, the better and more accurate reading and measurement we can take. This takes a lot of adjustment to get the best results from the optical surface. Once the measurement has been taken, we are provided with a series of results that show the optical quality of the surface plus other information. We will aim to provide 0.95 Strehl or higher.
Accessories (optional extras):
We have also developed a range of matching accessories to compliment the Horizon® 80ED. The first important accessory for imagers is the field flattener. This has been specially designed to work perfectly and compliment the Horizon® 80ED optics. There are 2 versions available for the 80mm ED. A 1.0x field flattener with no reduction or a 0.8x reducer/flattener. By using our field flatteners and reducers, you can rest assured you will have a lovely flat field each and every time. The field flattener also features a rotator with locking knob so you can ensure your camera is at the right orientation each and every time. A comprehensive, easy to follow instruction sheet is included on how to fit the flattener to your Horizon® 80 ED. The backfocus required to your sensor is 55mm.
The other fantastic accessory is the all new RVO Horizon® Guide. This is a high quality 50mm finder/guidescope that comes complete with a vixen clamp, 24mm illuminated crosshair eyepiece, 1.25" & T2 connections, ring system with 6 point delrin tipped adjusters complete with a high quality indexed helical focuser.
The retractable dew shield will keep a certain amount of dew at bay, but some nights will require a heater system to fully elimiate dew. Our RVO bands are perfect for the job. These high quality made bands simply wrap around the outer edge of the OTA close to the front element and gently heat the glass up just past the dew point. The bands have an elasticated velcro strap for a snug fit. All complete with either an integrated controller to work with any 12v power source, or an RCA jack for use with all dew controllers.
- Air Spaced 80mm ED Doublet Design
- 560mm Focal Length
- F/7 Focal Ratio
- Weight (OTA Only) 3.45kg
- Retracted Length 425mm
- CNC Machined Dual Speed Rack & Pinion Focuser
- Long 30cm Dovetail Bar With 1/4" Thread
- Retractable Dew Shield
- Aluminium Cap
- 2" - 1.25" Reducer With Non-marring Compression Rings
- Lightweight Aluminium CNC Machined Tube
- Collimatable Cell
- 10:1 Microfocuser
Our RVO Horizon® 80 ED OTA goes perfectly with a wide range of equatorial style systems. The included bar makes it compatible with all standard equatorial mounts with a vixen style saddle.